JPH02124703A - Ozonizer - Google Patents

Abstract

PURPOSE:To facilitate dimensional precision control of the title ozonizer and to improve the ozone generating efficiency by inserting a central electrode into the center of an insulating ceramic pipe pierced with many small holes in parallel, providing a peripheral electrode on the periphery, and arranging an intermediate electrode between both electrodes. CONSTITUTION:The cylindrical ceramic pipe 1 is pierced with the plural parallel small holes 2 in the axial direction. The central electrode 4 is inserted into the small hole 2 at the center of the pipe 1, and the peripheral electrode 5 is closely mounted on the center of the periphery of the pipe 1 at a distance of L from both ends and grounded. The intermediate electrodes 6 having the length almost equivalent to the length of the peripheral electrode 5 in the axial direction are inserted into the small holes 2 between both electrodes 4 and 5. When an AC voltage is impressed between both electrodes 4 and 5, a silent discharge is generated between the small hole 2 of the ceramic pipe 1 and each intermediate electrode 6, and the oxygen in the air in the discharge is converted to ozone.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an ozone generator.

[Prior Art] Conventionally, as shown in FIG. 4, an ozone generator uses one of a pair of parallel plate type 1i10.11 electric f! A dielectric 12 for obtaining a silent discharge is placed on the parallel plate type 4f1.10.11, and an alternating voltage is applied to the parallel plate type 4f1.10.11. Then, a silent discharge occurs in the space S between the other electrode 11 and the dielectric 12, and ozone is generated by the action of this discharge.

[Problem to be Solved by the Invention] However, if the pair of electrodes 10 and 11 are tilted, the electric field will be concentrated in the short distance between the electrodes 10 and 11, and a partial discharge will occur there. Therefore, there is a problem that ozone cannot be efficiently generated. Furthermore, since the space S is several meters wide, it is difficult to control the dimensional accuracy to a high degree.

The purpose of the present invention is 5. In order to solve the problem described in F, it is an object of the present invention to provide an ozone generator that facilitates dimensional accuracy control and also efficiently generates ozone.

Means for Solving the Problem] In order to solve the above object, the present invention provides an insulating ceramic tube in which a plurality of pores are arranged in parallel with each other and penetrating through the insulating ceramic tube; a central electrode inserted into the pore of the insulating ceramic tube; an outer peripheral electrode disposed on the outer periphery of the insulating ceramic tube to which an alternating voltage is applied between the central electrode; Its gist is that it is composed of a group of intermediate electrodes loosely inserted into the pores.

"Operation" Therefore, when an alternating voltage is applied between the center electrode and the outer electrode, a silent discharge occurs between the pores between the insulating ceramics and each intermediate electrode. Oxygen present in the air is converted to ozone by the action of silent discharge.

L Embodiment] Hereinafter, an embodiment embodying the present invention will be described based on FIG. 1.2.

An insulating ceramic tube 1 made of alumina porcelain is formed into a cylindrical shape, and has a plurality of square-shaped pores 2 extending in parallel with each other in the axial direction thereof. The entire insulating wall 3 in which the pores 2 are adjacent to each other is formed in a lattice shape with respect to the cross section of the ceramic tube 1.

The pore 2 in the center of the ceramic tube l has a center part 'IR'.
Mi4 (four in this example) is inserted, and a cylindrical outer electrode 5 is fitted tightly to the center of the ceramic tube 1 with a creepage distance of 1111L from both ends to the outer circumference of the ceramic tube 1. has been done. Note that this outer peripheral portion [5 is grounded.

An intermediate electrode 6 made of stainless steel and having approximately the same length in the axial direction as the external electrode 5 is loosely fitted into the hole 2 interposed between the picture electrodes 4 and 5 at a position corresponding to the external electrode 5. Therefore, the creepage distance i with respect to this intermediate electrode 66 and both electrodes 4.5 is
ll L iJ' B is kicked out.

The intermediate electrode 6 is supported by a thin insulating support member 6a at both ends of the pore 2 (not shown), and is held loosely inserted into the pore 2 (partially shown in FIG. 1). (only shown).

Next, the operation of the ozone generator configured as described above will be explained.

When an alternating voltage is applied to the Chuo Toden 4f14 and the outer electrode 5, the outer electrode 5 is always kept at zero potential because it is grounded. Therefore, a positive potential or a potential of n is applied to the central electrode 4 with respect to the zero potential of the outer peripheral part [i5.

As shown in FIG. 3, when the central electrode 4 has a dominantly positive potential, negative charges gather on the surface of the insulating wall 3 on the central electrode 1 side due to polarization.

On the other hand, positive charges gather on the outer circumferential surface of the insulating wall 3 on the pole 5 side. In addition, along with this, negative charges gather on the surface of the intermediate electrode 6 that is loosely inserted into the pore 2 on the center electrode 4 side, and the outer circumferential charge J#! Positive charges gather on the surface on the 5 side.

When the potential of the central S pole 4 changes to a negative potential, the intermediate electrode 6 produces a silent discharge.

Then, when the polarity of the center 8 poles 71 becomes a negative potential, each insulating wall 3 and the intermediate electrode 6 have a polarization action opposite to that in 1lij, and the polarity of the center Z@t4 changes to a positive potential. At this time, the intermediate electrode 6 produces a silent discharge.

Oxygen in the air within the pores 2 is converted into ozone by the action of this silent discharge. Therefore, by flowing air into the pores 2 as shown in FIG. 1, a large amount of ozone can be generated.

More than 90% of the discharge power of an ozone generator becomes heat,
By using the ceramic tube 1, it has excellent heat resistance, good heat emissivity, and the thermal shrinkage rate of ceramic due to heat is extremely small, so that a high degree of dimensional accuracy within the pores 2 can be maintained. As a result, there is no concentration of electric field due to dimensional changes, which prevents the occurrence of partial discharge.Furthermore, since discharge heat is released by the ceramic tube 1, uniform discharge can be sustained, and ozone can be generated efficiently. be able to.

Also, Chuo Toden I#! 4 to ml in the center of the ceramic tube l
By inserting it into the hole 2, the electric field distribution becomes uniform with respect to the outer peripheral electrode 5, so that silent discharge can be uniformly generated in the group of intermediate electrodes 6, and ozone can be generated efficiently. And the outer periphery [l! 5. By providing the creepage distance ML for each of the intermediate electrodes 61\, it is possible to prevent creepage discharge from occurring and shorting between the two molds 4124.5 and the intermediate molds 4Ii6 group.

By making the thickness of the insulating wall 3 as thin as possible, a wide discharge area can be contained in a small space, and the picture electrodes 4,
Get close or within 5 degrees. As a result, the capacitance increases and the discharge voltage becomes higher, so that ozone can be efficiently generated. Moreover, since processing of ceramics has become easier in recent years, the above requirements can be met.

In this example, a ceramic tube l made of alumina porcelain was used, but any material that is non-porous type ceramic and has excellent insulating properties may be used.Furthermore, stainless steel was used for the six groups of intermediate electrodes, but there was no sound. Any conductor that can withstand heat generated by discharge may be used.

Note that it is preferable that the air flowed into the ceramic tube 1 be dry with as little moisture content as possible.

It is also possible to flow oxygen instead of air.

Further, although the pores 2 are formed in a rectangular shape, they can also be formed in a round or polygonal shape.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and may be modified as desired without departing from the spirit of the present invention.

[Effects of the invention] As detailed above, by using an insulating ceramic tube as a dielectric material, the thermal contraction rate of the ceramic tube due to discharge heat is extremely small, and the dimensional accuracy within the pores can be maintained at a high level. This makes it possible to prevent partial discharge due to electric field concentration. As a result, uniform discharge can be sustained and ozone can be efficiently generated in the human foot.

[Brief explanation of drawings]

1 to 3 show an embodiment embodying the present invention.
The figure is a partially cutaway side view showing the principle configuration of the ozone generator, Figure 2 is a cross-sectional view taken along the line A-A in Figure 1, and Figure 3 is a cross-sectional view taken along the line A-A in Figure 1. FIG. 4 is a partially enlarged view showing the polarization effect of the insulating wall and the intermediate electrode group, and is a diagram showing the principle configuration of a conventional example. DESCRIPTION OF SYMBOLS 1... Ceramic tube, 2... Pore, 4... Center electrode, 5... Outer electrode, 6... Intermediate electrode. Patent applicant Kounaji~Support Co., Ltd. Agent Patent attorney On 1) Hironobu + 1st place

Claims (1)

[Claims] 1. An insulating ceramic tube having a plurality of pores arranged in parallel with each other and a central electrode inserted into the pore approximately in the center of the insulating ceramic tube; Consisting of an outer electrode arranged on the outer periphery of the insulating ceramic tube and to which an alternating voltage is applied between it and the central electrode, and a group of intermediate electrodes loosely inserted into the pores interposed between the two electrodes. An ozone generator characterized by: